【摘要】 研究了不同浓度 ( 0 .5,1,5,10 ,2 0 ,4 0 μg/L) DA- 6浸种对水稻幼苗生长及抗寒性的影响。结果表明 :用 DA- 6浸种处理后 ,水稻幼苗株高受抑 ,根冠比、发根力增大 ,叶绿素含量、根系活力及 CAT活性显著提高 ;DA- 6还可提高低温处理后水稻幼苗的存活率 ,阻止电解质渗漏 ,减缓低温对幼苗叶绿素的破坏 ,明显提高可溶性蛋白质含量 ;DA- 6浸种处理水稻种子的浓度以 5,10μg/L为佳。更多还原

【Abstract】 The seeds of rice were soaked with different concentrations (0.5,1,5,10,20,40μg/L)of DA 6.The influence of DA 6 on growth and cold resistance of the seedling were studied. The results showed that the reduction of the seedling height; the increase of the root crown ratio, ability of root growth, chl content,the vitality of root and the activities of CAT; when the seedings were immersed in 4℃,the seedling which had been presoaked with different concentration of DA 6 showed higher resistance to cold temperature the increase of seedling survive percentage, the reduction of cell electrolyte leakage, alleviation of the catabolism of chl, the increase of soluble protein content. The experiment also suggested that the suitable concentrations of DA 6 were 5,10μg/L and 10μg/L was rather better.更多还原